Marijuana moisturiser, sativa serum, pot perfume — the beauty industry has found its next hit. “Cannabis is America’s latest gold-rush,” says Alexia Inge, the co-founder of website Cult Beauty, which is known for spotting industry trends. While the plant itself has been on the fringes of the beauty industry for some time, it’s the cannabis-derivative cannabidiol (or CBD) that is now getting all the hype. As the legalisation of marijuana use in certain US states…